I am thinking of buying your latest dongle. I would use this with SDR# which I have successfully up and running with a cheapo dongle!!

I have what I'm sure is a stupid question! I notice that your dongle will potentially receive most of the HF spectrum down to 500khz. Is this as simple as plugging in an HF antenna and choosing a different input setting in SDR#? Do I have to input a frequency shift of -75,000,000 or -125,000,00?

Also, if I buy through your website and choose shipping from China will this be free delivery

The next thing I want to achieve is to run the v3 off my RPi on HF signals (recording audio only) at the command line. Does the CLI support just Q branch reception? I guess I'm looking for a list of rtl_fm switches that allow Q branch only rather than I & Q.

so you could probably use the "-E direct" flag. Though I am unsure if this would select the I or Q branch. Let me know if it doesn't work, I might be able to modify rtl_fm slightly to fix it otherwise.